Preheat over to 450 and make sure the rack is near the bottom of the oven (prefer one up from bottom) Whisk together eggs and milk, add salt sugar and flour and mis thoroughly. Small lumps are ok. Add butter and stir to combine. Divide the batter among the wells of your USA Popover Pan. Bake at 450 for 20 minute. Then, wihout opening the oven door, reduce the oven temp to 350 and bake an additional 10 to 15 min. If the popovers are browning too much on the top, place a rack at the top of the oven and place a cookie sheet on top to shieldtops. Once done, remove from oven and slit the tops with a shapr knife to release steam. Serve immediately.